Ground plane antenna for virtual radar/secondary surveillance radar (SSR) downlink 1090 MHz. Technical data: omnidirectional antenna, ground plan antenna for the reception of the ADS-B/Mode-S aircraft beacon, Frequency: secondary radar coverage (IFF) from 1070 to 1110 MHz, narrow-band, polarization vertical, gain 5 - 6 dB, Pmax 50 W, connector N-female, height of 355 mm, length the radial one 72 mm, inclusive mast mounting 25-54 mm. Material: Aluminum anodizes, mast mounting stainless steel. Due to the radiation pattern the Ground plane is suitable very well for the reception of the secondary radar signal (“from above”).